Akademik Veri Yönetim Sistemi
Journal of Plant Nutrition, cilt.17, sa.11, ss.1929-1938, 1994 (Scopus)
A reference treatment with a nutrient solution containing 94% nitrate (N03) and 6% ammonium (NH4) was compared with urea and proteinate treatments in which 20% of the N03 of the reference treatment was replaced by either of these two N sources. Proteinate is a fertilizer produced in Turkey containing 8% amino acid N and 8% N03-N. For both cultivars the fresh weights of the harvested plants were unaffected by the N source as was also the total N uptake. Nitrate content, however, was considerably lower in the urea and proteinate plants, values for the three treatments ranging from 3314 to 4579 mg N03/kg fresh wt making up from between 44.3% to 55.4% of the total plant N. Of the two cultivars, Berio accumulated greater concentrations of N03 than did Kirsten. The accumulation of Two cultivars of lettuce plants (Lactuca sativa L. cvs Berio and Kirsten) were grown for two months in late fall in NFT under three different nitrogen (N)-regimes but with the same total N concentration (13.4 mM). © 1994, Taylor & Francis Group, LLC. All rights reserved.